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Abstract

This article describes a latch mechanism which operates automatically when a unit is moved into or out of a required operating position. This movement can be either rotary or linear.

Country

United States

Language

English (United States)

This text was extracted from an ASCII text file.

This is the abbreviated version, containing approximately
100% of the total text.

Automatic Latch Mechanism

This article
describes a latch mechanism which operates
automatically when a unit is moved into or out of a required
operating position. This movement can be
either rotary or linear.

The design
principle is based on an "over the center" spring
mechanism.

Fig. 1 shows
unit 1 which has been rotated about pivot 3 to its
locked position. Bolt 4 is held against
stop surface 7 of housing 2
by the force of spring 6 on latch 5. For unlatching, unit 1 is pulled
back until latch 5 rotates through the maximum extended position of
spring 6 (Fig. 2).
Latching proceeds the other way
round.
The mechanism has the following
advantages:
o
It is user friendly, as it can be operated with one hand.
o
It can be readily moved into place without additional
latch operations.
o
It is moved to its final position and held in place by
spring force.